Thermoplastic Resin Composition and Molded Article Using Same

Patent metadata

Field	Value
Publication number	US-2016168376-A1
Application number	US-201414904806-A
Country	US
Kind code	A1
Filing date	May 8, 2014
Priority date	Aug 1, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

A thermoplastic resin composition including (A) bisphenol A-based polycarbonate, (B) biphenyl group-containing polycarbonate, (C) a biphenyl group-containing or terphenyl group-containing (meth)acryl-based copolymer and (D) a graft copolymer and a molded article manufactured from the same.

First claim

1 . A thermoplastic resin composition comprising:
(A) bisphenol A-based polycarbonate, (B) biphenyl group-containing polycarbonate, (C) a biphenyl group-containing or terphenyl group-containing (meth)acryl-based copolymer, and (D) a graft copolymer.

2 . The thermoplastic resin composition of claim 1 , wherein the thermoplastic resin composition comprises:
10 to 85 wt % of the bisphenol A-based polycarbonate (A), 5 to 80 wt % of the biphenyl group-containing polycarbonate (B), 5 to 50 wt % of the biphenyl group-containing or terphenyl group-containing (meth)acryl-based copolymer (C), and 1 to 50 parts by weight of the graft copolymer (D) based on 100 parts by weight of (A) to (C).

3 . The thermoplastic resin composition of claim 1 , wherein the bisphenol A-based polycarbonate (A) has a weight average molecular weight of 10,000 to 50,000 g/mol.

4 . The thermoplastic resin composition of claim 1 , wherein the biphenyl group-containing polycarbonate (B) comprises a repeating unit represented by Chemical Formula 1, a repeating unit represented by Chemical Formula 2, and a repeating unit represented by Chemical Formula 3:

wherein in Chemical Formula 2,
R 1 and R 2 are independently a substituted or unsubstituted C1 to C6 alkyl group, and a and b are independently an integer ranging from 0 to 4,

wherein in Chemical Formula 3,
R 3 and R 4 are independently a substituted or unsubstituted C1 to C6 alkyl group, and c and d are independently an integer ranging from 1 to 4.

5 . The thermoplastic resin composition of claim 4 , wherein the biphenyl group-containing polycarbonate (B) comprises:
10 to 85 mol % of the repeating unit represented by Chemical Formula 1, 5 to 30 mol % of the repeating unit represented by Chemical Formula 2, and 10 to 80 mol % of the repeating unit represented by Chemical Formula 3.

6 . The thermoplastic resin composition of claim 1 , wherein the biphenyl group-containing polycarbonate (B) has a weight average molecular weight of 20,000 to 40,000 g/mol.

7 . The thermoplastic resin composition of claim 1 , wherein the biphenyl group or terphenyl group-containing (meth)acryl-based copolymer (C) comprises:
a repeating unit derived from aromatic (meth)acrylate having a refractive index of 1.58 to 1.70 (C-1) and a repeating unit derived from a mono-functional unsaturated monomer (C-2).

8 . The thermoplastic resin composition of claim 7 , wherein the aromatic (meth)acrylate having a refractive index of 1.58 to 1.70 (C-1) is represented by Chemical Formula 4:

wherein in Chemical Formula 4,
R 5 is hydrogen or a methyl group, m is an integer ranging from 0 to 10, X is an orthobiphenyl group, a metabiphenyl group, a parabiphenyl group, a 2,6-terphenyl group, an orthoterphenyl group, a metaterphenyl group, or a paraterphenyl group.

9 . The thermoplastic resin composition of claim 7 , wherein the biphenyl group or terphenyl group-containing (meth)acryl-based copolymer (C) is a copolymer of:
1 to 50 wt % of the aromatic (meth)acrylate having a refractive index of 1.58 to 1.70 (C-1) and 50 to 99 wt % of the mono-functional unsaturated monomer (C-2).

10 . The thermoplastic resin composition of claim 7 , wherein the biphenyl group or terphenyl group-containing (meth)acryl-based copolymer (C) has a refractive index of 1.490 to 1.579 and further comprises 49 wt % or less of alicyclic or aromatic (meth)acrylate (C-3) represented by Chemical Formula 5 or Chemical Formula 6:

wherein in Chemical Formula 5,
R 6 is hydrogen or a methyl group, m is an integer ranging from 0 to 10, and Y is selected from the group consisting of a cyclohexyl group, a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a propylphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group, and a benzylphenyl group,

wherein in Chemical Formula 6,
R 7 is hydrogen or a methyl group, m is an integer ranging from 0 to 10, Z is oxygen (O) or sulfur (S), and Ar is selected from the group consisting of a cyclohexyl group, a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group, and a benzylphenyl group.

11 . The thermoplastic resin composition of claim 1 , wherein the graft copolymer (D) has a core-shell structure including a diene-based rubber core.

12 . The thermoplastic resin composition of claim 11 , wherein the graft copolymer (D) comprises a shell including at least one compound selected from an acryl-based monomer, an aromatic vinyl-based monomer, an unsaturated nitrile-based monomer, and a combination thereof, and grafted on the diene-based rubber core.

13 . The thermoplastic resin composition of claim 11 , wherein the graft copolymer (D) comprises 30 to 80 wt % of the diene-based rubber core.

14 . A molded article manufactured using the thermoplastic resin composition of claim 1 .

15 . The molded article of claim 14 , wherein the molded article has pencil hardness of HB to 2H measured by JIS K 5401 evaluation method,
a scratch resistance width of 230 to 310 μm measured by a BSP evaluation method, and an Izod impact strength of 7 to 60 kgf·cm/cm in a ⅛″ thickness measured according to ASTM D256.

Assignees

• Samsung Sdi Co Ltd
• Samsung Sdi Co Ltd

Inventors

• Kwon Kee-Hae
• Kim In-Chol
• Jang Joo-Hyun
• Chi Jun-Ho
• Hong Chang-Min

Classifications

• C08L55/02

  ABS [Acrylonitrile-Butadiene-Styrene] polymers · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08J5/00

  Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes B01D67/00 - B01D71/00) · CPC title

• C08L51/04

  grafted on to rubbers · CPC title

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title